svelte/packages/parse-css/tests/samples/pseudo-classes/input.css

/* test that all these are parsed correctly */
::view-transition-old(x-y) {
	color: red;
}
:global(::view-transition-old(x-y)) {
	color: red;
}
::highlight(rainbow-color-1) {
	color: red;
}
custom-element::part(foo) {
	color: red;
}
::slotted(.content) {
	color: red;
}
:is( /*button*/
	button, /*p after h1*/
	h1 + p
	) {
	color: red;
}